Nitrate of pounds per acre is to broadcast 150 pounds when the soil 

 r is being prepared for seeding in the spring, and the remain- 

 ing 150 pounds from six to eight weeks later; the second 

 3 application as a top-dressing, well worked into the soil. 

 After top-dressing, the surface tillage should be deepened, 

 and the treatment made more thorough ; where high-grade 

 plant food materials are used as a top-dressing, there is 

 always a tendency to form surface crusts, the remedy is 

 simply a trifle more thorough cultivation and a little deeper. 



Work of 

 Colorado Agricultural Experiment Station. 



Abstract of Bulletin No. 115. 

 Fertilizer Experiments with Sugar- Beets. 



By A. H. Danielson. 

 Colorado Station. 



These experiments extended over three years and were 

 made to test the effect of different artificial fertilizers and 

 manure on the yield and quality of sugar-beets under 

 practical field conditions. 



The experiments consisted of a series of plots with 

 fertilizer containing the three essential elements, Nitrogen, 

 phosphoric acid and potash, alone and in all possible com- 

 binations. After preliminary experimenting the source of 

 the elements chosen as being more easily soluble in the 

 soil, was for Nitrogen, Nitrate of Soda ; for phosphoric 

 acid, acid or soluble phosphate rock and bone, and for 

 potash, high-grade sulphate of potash. 



Other fertilizers used were also raw bone meal, ground 

 oyster shell, basic slag and dried blood. 



The size of the plots ranged from one-tenth to six- 

 tenths of an acre each, the yields were from 10 tons to 25.5 

 tons, and the profit from the most effective element, from 

 $6.00 to $15.00 per acre over the cost of application. 



Colorado soils are chemically exceptionally rich in 

 phosphoric acid and potash, with an excess of lime, only 

 Nitrogen and humus are likely to be somewhat low. 



